Cart on a ramp

Modeling motion using graphs utilizing data collection via labpro and analysis using loggerpro. You have used this system in chemistry.

Follow in detail the directions in the handout. Your ultimate goal is to be able to state the following relationships.

• position - time graph
  • find the acceleration with a curve fit, position = d_o + vt + 1/2at²
• velocity - time graph
  • Find the acceleration with a curve fit, velocity = v_o + at
• acceleration - time graph
  • find the acceleration with a statistical analysis

Do the preliminary questions before you start the lab.

Setup:

1. Connect all probes to Labpro and computer BEFORE starting the loggerpro software.
2. OPEN File, “02 cart”
3. Now, Insert -> Graph (A acceleration vs time graph appears.)
4. CRTL-R To auto arrange all the graphs.
   

Collect data:

1. Note that there is a dead zone of about 30 cm in front of the motion detector, if the cart moves into this area, you will not get data. This will show up as a flat line.
2. Too clean up your graphs click on the graphs and CTRL-J to auto scale the graphs
3. Print out the graphs, Select, page 1 of 1 only and print copies for each lab partner.

The acceleration graph needs to be manually scaled, right-click on the graph, select "graph options" then the "Axis options" tab

Write up

• Activity type write up
• Add a cover page
• When referring to a graph please specifically state what it is that you want the reader to note, don't simply state "look at graph"
• Label and answer each activity question.
• Give specific evidential support for your statements.
  • i.e. "As seen by,.. in the a - t graph, etc.
• When answering questions that call for a comparison please include the numbers and the difference, look for some mathematical relationship and state it.

Additional question

Go back to your preliminary questions and comment on them. Were you correct? How has your view of motion changed?